* {
  margin: 0;
  padding: 0;
}
body,
html {
  height: 100%;
}
ul,
li {
  list-style: none;
}
a {
  text-decoration: none;
}
.container {
  width: 1440px;
  height: 1006px;
  background-color: #fff;
  border: 1px dashed #cecece;
  margin: 0 auto;
}
.sider_nav {
  width: 260px;
  height: 1006px;
  float: left;
  position: relative;
}
.sider_nav > span {
  display: block;
  position: absolute;
  left: 27px;
  bottom: 40px;
}
.sider_nav > span > img {
  display: block;
  width: 20px;
  height: 20px;
}
.sider_nav ul {
  width: 240px;
  margin: 0 auto;
  margin-top: 99px;
}
.sider_nav li {
  height: 44px;
  line-height: 44px;
  text-align: center;
  color: #61677f;
  display: flex;
  justify-content: start;
}
.sider_nav li > a {
  font-size: 13px;
  color: #61677f;
}
.sider_nav li > span {
  margin: 0 22px;
  font-size: 16px;
}
.sider_nav li:hover,
.sider_nav li.hover {
  background-color: #8146ff;
}
.sider_nav li:hover > a,
.sider_nav li:hover > span,
.sider_nav li.hover,
.sider_nav li.hover > a {
  color: #fff;
}
.main {
  width: 1180px;
  height: 1006px;
  float: left;
  background-color: #efefef;
}
.nav {
  box-sizing: border-box;
  display: flex;
  justify-content: space-between;
  background-color: #fff;
}
.nav > * {
  margin: 24px 40px 24px 60px;
}
.nav > div {
  display: flex;
  width: 264px;
  height: 42px;
}
.nav > div:nth-of-type(1) {
  box-sizing: border-box;
  border: 1px dashed #cecece;
}
.nav > div:nth-of-type(1) > span {
  font-size: 18px;
  line-height: 42px;
  color: #61677f;
  margin: 0 14px 0 21px;
}
.nav > div:nth-of-type(1) > input {
  outline: none;
  border: none;
}
.nav > div:nth-of-type(1) > input::placeholder {
  font-size: 14px;
  color: #61677f;
}
.nav > div:nth-of-type(2) {
  justify-content: end;
}
.column {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
  box-sizing: border-box;
  padding-top: 20px;
  width: 100%;
  height: 375px;
}
.column > div {
  position: relative;
  width: 359px;
  height: 158px;
  background-color: #fff;
}
.column > div > h2 {
  position: absolute;
  top: 40px;
  left: 28px;
}
.column > div > p {
  font-size: 14px;
  position: absolute;
  top: 102px;
  left: 29px;
}
.column > div > img {
  display: block;
  position: absolute;
  right: 9px;
  bottom: 1px;
}
